Two wires run horizontally between the posts. Battling the chest-high briar thickets always left my arms and legs scratched. margin-left:.5in; mso-font-signature:-536870145 1107305727 0 0 415 0;} The end posts, where wire tensioning is used, should be larger in diameter than the line posts. mso-ascii-theme-font:minor-latin; Set posts 20 to 30 ft apart in the row. AG-697. @font-face @font-face /* Font Definitions */ Build trellis before planting for optimal results. Trailing varieties should be spaced 6 to 8 apart. We suggest a minimum of 8 ft in length with a 6 in. Since the posts were in excellence shape (probably pressure treated) I decided to make a large blackberry trellis. Once the plants begin to grow, Jason selects the two strongest canes to train and cuts the rest to the ground. rick, my system is identical to yours only I have the turnbuckles, not Gripplesand mine arent nearly as clean as those beauties. rounds). {font-family:Wingdings; Each trellis type has advantages and disadvantages. A wooden trellis with cross bucks will cost at least $10a 6 ft 4x4 treated post, treated 2x4, and 4" stainless steel wood screws. Oregon was made for growing blackberries. hXKWHL A. mso-pagination:widow-orphan; @font-face mso-ascii-theme-font:minor-latin; I have a long berry row, about 125 feet long, with a bout 12 raspberry and 10 semi-trailing blackberry plants. Your trellis system will be secure for many years if it is erected with care, so it may be used for many seasons. Source: Gina Fernandez, NC State University. mso-fareast-font-family:Calibri; mso-font-charset:0;